Translating AT commands to ModemManager commands?

[Aleksander Morgado]

On Wed, May 17, 2017 at 10:27 AM, Einar Jón <tolvupostur at gmail.com> wrote:
> # Testing that the modem is alive
> AT            -> easy

Yes, just check if the modem is exposed, and if it is it was able to talk AT.

> # Testing that the SIM is not locked
> AT+CPIN?  ->  'UnlockRequired'

Yes, UnlockRequired:
https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.html#gdbus-property-org-freedesktop-ModemManager1-Modem.UnlockRequired

> # Testing Subscriber Identity
> AT+CIMI

This would be SIM IMSI:
https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Sim.html#gdbus-property-org-freedesktop-ModemManager1-Sim.Imsi

> # Testing error level setting
> AT+CMEE=2

We don't have anything for this in the API.

> # Testing Antenna Power
> AT+CIND?

AT+CIND is generic for a lot of different indicators. We don't have
anything in the API specific for "antenna power". What is the
indicator you want to retrieve exactly?

> # Testing check power mode
> AT+CFUN? 'PowerState'

Yes, PowerState:
https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.html#gdbus-property-org-freedesktop-ModemManager1-Modem.PowerState

> # Testing Signal Power
> AT+RSCP?

The "Umts" dictionary in the "Signal" interface now may expose RSCP
values if the backend implementation supports it:
https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.Signal.html#gdbus-property-org-freedesktop-ModemManager1-Modem-Signal.Umts

The "latest" api docs don't say anything about it because it was added
in git master only:
https://cgit.freedesktop.org/ModemManager/ModemManager/commit/introspection/org.freedesktop.ModemManager1.Modem.Signal.xml?id=9b3549e375af5d80fa9986cdbddfa51fe16dfe3e

We obtain the values for the extended Signal interface in AT-based
modems using +CESQ, though, see:
https://cgit.freedesktop.org/ModemManager/ModemManager/commit/src/mm-broadband-modem.c?id=90943177ed7913ee506fb9e5d37bb693d38b54f6

> # Testing Signal Quality
> AT+CSQ -> 'SignalQuality'

Yes, SignalQuality:
https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.html#gdbus-property-org-freedesktop-ModemManager1-Modem.SignalQuality

> # Testing PLMN selection
> AT+COPS?

That would be querying the current operator of the serving system, so
either OperatorCode or OperatorName:

https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.Modem3gpp.html#gdbus-property-org-freedesktop-ModemManager1-Modem-Modem3gpp.OperatorCode

https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.Modem3gpp.html#gdbus-property-org-freedesktop-ModemManager1-Modem-Modem3gpp.OperatorName


-- 
Aleksander
https://aleksander.es